Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Place the broccoli florets, sliced bell peppers, and zucchini on the baking sheet.
Drizzle the vegetables with half of the avocado oil and season with a portion of the sea salt and black pepper.
Toss the vegetables to coat evenly and roast in the oven for 18-20 minutes until tender and slightly charred.
While the vegetables roast, pat the chicken breast dry and season both sides with the remaining sea salt, black pepper, garlic powder, smoked paprika, and dried oregano.
Heat the remaining avocado oil in a large stainless steel or cast-iron skillet over medium-high heat.
Once the pan is hot, add the chicken breast and sear for 6-7 minutes per side, or until the internal temperature reaches 165°F and the crust is golden brown.
Remove the chicken from the pan and let it rest for 5 minutes to lock in the juices.
Slice the chicken and serve immediately alongside the roasted vegetable medley.